When I started sewing triangles years ago, I used this particular technique to make 2 half square triangles at once. It's simple and quite accurate. Full video: - https://youtu.be/c-eHTFXnnpM Blog post: https://mypatchwork.wordpress.com/2018/03/22/video-tutorial-half-square-triangle-quilt-block-quilting-for-beginners-series | TeresaDownUnder